138 ACADEMY OF NATURAL SCIENCES 



Body black : clypeus truncate or slightly emarginate at tip : 

 thorax punctured, lateral margins rufous, posterior angles obtusely 

 rounded : scutel blackish : elytra rufous, immaculate, striate, the 

 striae punctured : interstitial spaces very minutely punctured and 

 but slightly convex : beneath blackish-piceous : feet rufous. 



Length more than three-twentieths of an inch. 



Var. a. Anterior and lateral margins of the clypeus rufous. 



This species is an inhabitant of Pennsylvania, I also obtained 

 specimens of it in the vicinity of Engineer Cantonment on the 

 Missouri. It is certainly not the same with the insect which 

 Fabricius described under the name of Jimetarius, as it is much 

 smaller and the clypeus is not tuberculated. I have therefore 

 adopted a new name for this species 



5. A. CONCAVUS. — Thorax impunctured on the disk. 

 Inhabits near the Rocky Mountains. 



Body black or rufous ; beneath piceous : clypeus very obtusely 

 emarginate before : thorax with rather large distant punctures 

 each side ; disk, impunctured ; posterior angles very obtusely 

 rounded : elytra, striae punctured ; interstitial spaces impunctured, 

 flat : anterior tibia strongly tridentate. 



Length three-tenths of an inch. 



This species occurred on the Arkansa river near the moun- 

 tains. It is about equal in size to A. ohhngus, but will not be 

 readily confounded with that insect, as the disk of the thorax 

 is impunctured, and the edge of the clypeus is unarmed. The 

 lateral thoracic punctures in one specimen are obsolete. [215] 



6. A. OBLONOUS. — Black punctured ; clypeus with two tuber- 

 cles in the anterior emargination. 



Inhabits the United States. 



Scarahseus ohioiujus Knoch in Melsh. Catal. 



Body black j beneath blackish-piceous : clypeus punctured, 

 punctures confluent before ; anterior edge emarginate and with a 

 prominent acute tooth each side of the emargination ; a trans- 

 verse impressed line between the eyes, which is angulated in the 

 middle : thorax punctured : elytra with punctured striae, and 

 very minute punctures in the interstitial spaces. 



Length three-tenths of an ii«ch. 



This species appears to be common to most parts of the United 



[Vol. III. 



